﻿<!DOCTYPE html>
<html>
<head>
    <title></title>
    <style>
        body 
        {
            font-size:xx-large;
        }
    </style>
    <script>
        function notifyMe() {
            window.external.notify("123"); 
        }
    </script>
</head>
<body>
    
    hallo welt<br />
    <input id="Button1" type="button" value="Hallo" onclick="notifyMe();"/>
</body>
</html>
